05 RG with FBI 200 kit. Just bought and needed a tire. Had an Avon Venom 200/55/17 on it. replaced with Dunlop Roadsmart same size. Only rode it once about 100 mi before I changed the tire didnt really notice any issue. After I change I noticed a very uncomfortable wobble when I am going straight. if you wiggle in the seat or bars at all the bike gets that pretty strong wobble. Kind of like a trailer behind your truck what starts to wiggle the truck. increased the tire pressure and didnt seem to help much. called FBI , they dont think its the tire. Tire is rated up to 850lbs, but I think the dunlop was like 950.
FBI said to check front engine mount. gonig to check that but I am thinking its a tire issue. Anyone else have experience our thoughts???? thanks

 

You need a tire with a reinforced sidewall,if the side wall is weak it will act like your bike.Grab your bike by the handle bar on one side,shake it back and forth and look at the rear tire for wiggle.

 

while it is parked or rolling?

I have a Dunlop Roadsmart 200/50zr 17.

 

Check it while it's parked.If it wiggles you'll know.

 

lmfao.. while it is rolling....

 

You might also want to check the triple clamps and steering head bearings. Loose clamps or worn or loose steering head bearings can cause a wobble at speed.